Change animations to use the proper SequenceProvider

Remove references to the global "Game" and use the SequenceProvider
of the current world/map.

OpenRA.Mods.D2k/Render/WithProductionOverlay.cs

@@ -47,7 +47,7 @@ namespace OpenRA.Mods.RA.Render
 
 			buildComplete = !self.HasTrait<Building>(); // always render instantly for units
 
-			overlay = new Animation(rs.GetImage(self));
+			overlay = new Animation(self.World, rs.GetImage(self));
 			overlay.PlayRepeating(info.Sequence);
 			rs.anims.Add("production_overlay_{0}".F(info.Sequence),
 				new AnimationWithOffset(overlay,